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Structural characterisation of an anti-complementary arabinogalactan from the roots of Angelica acutiloba kitagawa by Haruki Yamada; Hiroaki Kiyohara; Jong-Chol Cyong; Yasuo Otsuka is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.
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## ABsrRAcr An anti-complementary arabinogalactan (AGIIb-l), isolated from the roots of Angelica ucuti~obu Kitagawa, has been subjected to methylation analysis, digestion with a+arabinofuranosidase, controlled Smith-degradation, and partial acid hydrolysis. AGIIb-1 consisted of arabinose, galactose, rhamnose, galacturonic acid, and glucuronic acid in the molar ratios 1.8-2.2:1.0:0.2-O-3:0.2-0.4:O.l. AGIIb-1 contained mainly an arabino3,6\_galactan moiety, and most of the Ara was present as or-arabinofuranosyl residues in the non-reducing terminals and the highly polymerised and branched side-chains which were attached mainly to positions 3 and 6 of (1+6)-and (l-\*3)-linked Gal, respectively. Some Aracontaining chains were also attached to (1+4)-linked Gal residues. The 13C-n.m.r. data for AGIIb-1 showed that the Galp was /I. Mild acid hydrolysis of AGIIb-1 yielded several linear and highly branched arabino-oligosaccharides, a neutral arabinogalactan, and two acidic arabinogalactans. Some arabino-oligosaccharides contained a (1+4)-linked Arap at the reducing terminal. The neutral arabinogalactan contained (1+3)-, (l-+4)-, and (146)linked and 3,6-d&O-substituted Gal, whereas the acid
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- Author
- Haruki Yamada; Hiroaki Kiyohara; Jong-Chol Cyong; Yasuo Otsuka
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0008-6215)
- Published
- 1987
- Language
- EN
- Field
- Biochemistry, Genetics and Molecular Biology (Life Sciences)